METHOD OF PREPARATION OF A COMPOST FROM SEWAGE SETTLINGS Russian patent published in 2005 - IPC

FIELD: methods of organic wastes treatment.

SUBSTANCE: the invention is pertaining to the fields of treatment of organic waste materials and is intended for preparation of fertilizers from settlings of sewage contaminated by heavy metals. The method provides for mixing of settlings of sewage with a high-moisture-absorbing and a gettering admixtures, formation out of the produced mixture of a compost hill on a perforated pipeline, a periodic blowing through the compost hill by air using this pipeline, making in the top of the of a compost hill of oxidative conditions and in its bottom - reduced conditions, placement under the basis of the compost hill of a filtration layer and an anti-filtration layer having broken a structure, formation of an evaporation area outside the limits of the compost hill. The perforated pipeline is made in the form o a zigzag out of the in turn soldered sections of the perforated pipes from heterogeneous conductors or from conductors and semiconductors forming of a ring-shaped thermopile. Internal seams of the thermopile are placed in a midpoint of the compost hill and its external seams - beyond its limits. In the top part of the compost hill they place an electrode made in the form of a metal screen, connected to a positive pole of the thermopile, and in the lower part of the compost hill - an electrode made in the form of a metal screen, connected to a negative pole of the thermopile. The method allows to speed up the process of the heavy metals withdrawal from the compost mass and to increase effectiveness of the composting process.

EFFECT: the invention ensures acceleration of the process of heavy metals withdrawal from a compost mass and increased effectiveness of the composting process.

3 cl, 2 dwg